לוח שנה משולב

Rhodopsins are a ubiquitous family of light sensing/signaling proteins. In recent work, our group discovered an intriguing family of rhodopsins in algae: the bestrhodopsins. Through cryo-EM and comprehensive biochemical and electrophysiological studies, we showed that bestrhodopsins are fusions of rhodopsins and ion channels which assemble as mega-complexes to enable light-controlled passage of ions across membranes. Regulation of a classical ion channel by an attached photoreceptor has never been found before in nature, and previous attempts to engineer light-regulated fused channels have yielded limited success. The discovery and characterization of bestrhodopsins thus provide a new template for designing proteins with light-sensing and ion-conducting activities, as well as represent a platform for regulating cellular signaling in living organisms using light. These findings are therefore not only important as a basic scientific discovery but also for the field of optogenetics where neural activity is controlled by light.
In the present talk, I will present the discovery of the bestrhodopsins, and explain how we use our cryo-EM work for structure-based design of dramatically improved tools to manipulate signaling cascades in cells by light control, paving the way for the next generation of optogenetics tools to study brain function in vivo.

TBA

Recent research has increasingly focused on the intricate interactions between the brain and the immune system, a critical line of inquiry for understanding neurological disorders like Alzheimer's Disease (AD). AD, once defined primarily by amyloid-β and tau aggregations, is now being explored for its complex interplay with immune processes, offering a deeper understanding of its development.
This study delves into the dynamic relationship between the brain and the immune system, utilizing human samples from individuals predisposed to AD and various preclinical models. Our findings reveal that both environmental and genetic risk factors for AD significantly influence immune phenotypes and functions, which in turn impact disease progression.
Further, we discovered that disrupting brain-spleen communication alters myeloid cell fate and cognitive performance in 5xFAD mice. These insights demonstrate the profound and reciprocal influence between the brain and the immune system. They underscore the importance of these interactions in understanding not only AD but also a wider array of neurological conditions, suggesting that this interplay is crucial for comprehending the complexities of such diseases.

Zoom Link: https://weizmann.zoom.us/j/5420322495?pwd=ZmhUR0kxWTB6aDh0bklBNFlzV1JNdz09
Meeting ID: 542 032 2495
Password: 862769

We are building a new ground-based observatory in Neot Smadar, located in the south of the Negev desert.
One of the telescopes hosted at this site is the Large Array Survey Telescope (LAST). LAST is a cost-effective survey telescope capable of quickly
scanning the sky and studying the dynamic sky, from solar system objects to explosions at cosmological distances.
I will describe the Neot Smadar site, the LAST system, and some of the science cases for which LAST was built.